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Finding the Fourth Proportional to 20,673.71, 30,985.95 and 14,399.75

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Solution

The fourth proportional to 20,673.71, 30,985.95 and 14,399.75 is: 21,582.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,673.71 : 30,985.95 = 14,399.75 : x
  2. Step 2: Convert to fraction form
    20,673.71/30,985.95 = 14,399.75/x
  3. Step 3: Cross multiply
    20,673.71x = 30,985.95 × 14,399.75
  4. Step 4: Simplify right side
    20,673.71x = 446,189,778.58
  5. Step 5: Solve for x
    x = 446,189,778.58/20,673.71
  6. Step 6: Final answer
    x = 21,582.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.